Update README with link to user docs.
Update README with link to user docs.

pandaproject/panda,pandaproject/panda,datadesk/panda,ibrahimcesar/panda,newsapps/panda,ibrahimcesar/panda,NUKnightLab/panda,newsapps/panda,pandaproject/panda,datadesk/panda,NUKnightLab/panda,pandaproject/panda,ibrahimcesar/panda,PalmBeachPost/panda,newsapps/panda,PalmBeachPost/panda,datadesk/panda,datadesk/panda,ibrahimcesar/panda,NUKnightLab/panda,ibrahimcesar/panda,NUKnightLab/panda,PalmBeachPost/panda,datadesk/panda,PalmBeachPost/panda,PalmBeachPost/panda,pandaproject/panda,newsapps/panda